What is the new rule?

The joint statement said presidents have the power to “suspend the entry of all aliens” and to impose “any restrictions he may deem to be appropriate on them” if they are judged to be “detrimental” to US interests under the Immigration and Nationality Act.

Accordingly, if the president issues a suspension or ban on entry through the US/Mexican border, those who illegally manage to enter the US will not be allowed to apply for asylum once there.

“Today, we are using the authority granted to us by Congress to bar aliens who violate a Presidential suspension of entry or other restriction from asylum eligibility,” the statement said.

The rule will not apply retroactively. President Trump is expected to sign it shortly.

Under US law, there is a legal obligation to hear asylum claims from migrants if they say they fear violence in their home countries.

Those seeking asylum must be fleeing due to a serious fear of persecution. Under international law, these are considered refugees.

If an asylum seeker enters the US illegally, they have been – until now – still entitled to a hearing of their claim.

What have critics said?

The American Civil Liberties Union declared the move “illegal”.

“US law specifically allows individuals to apply for asylum whether or not they are at a port of entry,” they said.

Human rights group Amnesty International also came out against the rule.